PT-2026-105847

Summary When OAuth tokens are saved, MCP Atlassian always writes a plaintext fallback copy under /.mcp-atlassian/oauth-.json. The fallback file is created with the process default umask rather than restrictive permissions. In this environment the file was created as mode 0664, exposing access and...

MCP Atlassian: Insecure File Permissions on OAuth Token Storage

Summary The OAuth token fallback file storage in OAuthConfig.savetokenstofile creates token files containing access tokens, refresh tokens, and cloud IDs with default filesystem permissions typically 0644 on Linux, world-readable. Any local user on a shared system can read these files to obtain...

CVE-2026-77256

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the plaintext OAuth fallback file containing refresh and access tokens is written with permissions inherited from the process umask. Under common or permissive configurations, other...

CVE-2026-77256 MCP Atlassian: OAuth refresh-token backup file is world-readable under default Unix umask

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the plaintext OAuth fallback file containing refresh and access tokens is written with permissions inherited from the process umask. Under common or permissive configurations, other...

CVE-2026-77256 MCP Atlassian: OAuth refresh-token backup file is world-readable under default Unix umask

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the plaintext OAuth fallback file containing refresh and access tokens is written with permissions inherited from the process umask. Under common or permissive configurations, other...

CVE-2026-77256

The MCP Atlassian Model Context Protocol server (versions prior to 0.22.0 ) contains a vulnerability where the plaintext OAuth fallback file, which stores refresh and access tokens , is created with permissions inherited from the process umask . In many standard or permissive configurations, this...

EUVD-2026-84761

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the plaintext OAuth fallback file containing refresh and access tokens is written with permissions inherited from the process umask. Under common or permissive configurations, other...

CVE-2026-77256 MCP Atlassian: OAuth refresh-token backup file is world-readable under default Unix umask

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the plaintext OAuth fallback file containing refresh and access tokens is written with permissions inherited from the process umask. Under common or permissive configurations, other...

CVE-2026-77250

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, OAuthConfig writes a plaintext fallback file containing access and refresh tokens under the user's .mcp-atlassian directory using process-default permissions. On systems with a...

CVE-2026-77250 MCP Atlassian: OAuth fallback token storage writes plaintext access and refresh tokens with group-readable permissions

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, OAuthConfig writes a plaintext fallback file containing access and refresh tokens under the user's .mcp-atlassian directory using process-default permissions. On systems with a...

EUVD-2026-84619

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, OAuthConfig writes a plaintext fallback file containing access and refresh tokens under the user's .mcp-atlassian directory using process-default permissions. On systems with a...

CVE-2026-77250 MCP Atlassian: OAuth fallback token storage writes plaintext access and refresh tokens with group-readable permissions

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, OAuthConfig writes a plaintext fallback file containing access and refresh tokens under the user's .mcp-atlassian directory using process-default permissions. On systems with a...

CVE-2026-77250

The MCP Atlassian Model Context Protocol server for Confluence and Jira is vulnerable in versions prior to 0.22.0 . The OAuthConfig component writes a fallback file containing plaintext access and refresh tokens into the .mcp-atlassian directory using process-default permissions . On systems with...

CVE-2026-77250 MCP Atlassian: OAuth fallback token storage writes plaintext access and refresh tokens with group-readable permissions

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, OAuthConfig writes a plaintext fallback file containing access and refresh tokens under the user's .mcp-atlassian directory using process-default permissions. On systems with a...

PT-2026-96948

Name of the Vulnerable Software and Affected Versions MCP Atlassian versions prior to 0.22.0 Description The software writes a plaintext OAuth fallback file containing refresh token and access token using permissions inherited from the process umask a user file-creation mode mask. In permissive...

PT-2026-96925

Name of the Vulnerable Software and Affected Versions MCP Atlassian versions prior to 0.22.0 Description OAuthConfig writes a plaintext fallback file containing access token and refresh token within the user's .mcp-atlassian directory. This file is created using process-default permissions rather...

CVE-2026-77256: Incorrect Permission Assignment for Critical Resource

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the plaintext OAuth fallback file containing refresh and access tokens is written with permissions inherited from the process umask. Under common or permissive configurations, other...

CVE-2026-77250: Cleartext Storage of Sensitive Information

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, OAuthConfig writes a plaintext fallback file containing access and refresh tokens under the user's .mcp-atlassian directory using process-default permissions. On systems with a...